Question about Canon Rebel XT / EOS 350D Digital Camera

Error 99 in EOS 400D

I have a new Canon EOS 400D. While trying to use the built in flash it is giving me Error 99 stating to replace the battery. I have cleaned the lens contact and the Date-Time CR2016 battery also but did not work. Please advice.

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797 Answers

Here is a link which may help you.
http://forums.dpreview.com/forums/read.asp?forum=1031&message=9598105

It may be that the contacts on the lens is dirty, follow the directions, by using a clean pencil eraser (I would also suggest to use alcohol and clean the contacts after using the eraser). Also to remove the date button battery and the other batteries, then turn on the camera (with all batteries removed).
Then put the batteries back in.

Posted on Aug 24, 2008

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My name is Madhu. I use the camera Canon EOS 400D / Digital Rebel XTi. When the inbuilt FLASH is on then a message pop up as "busy now", when i tried to click the camera to take a photo then...

Welcome to Fixya
Err 99 could mean several different things, such as... Memory Card, Lens or Lens contacts....

Here's what you can try:
Remove the memory card an enable "shooting with out memory card" and see if you still get the error. If it works your memory card is bad. Try another lens if you can. Clean the lens contacts with a pencil eraser (be careful not to get eraser dust in the camera body or in the lens). Worst case scenario is, Err 99 could be related to the shutter failing which would mean a trip to Canon.
Thank you

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Canon 400D,Error 99 keeps coming up,have replaced battery pack,even recharged batteries,stillbeing told to"replced battery pack".Help...

Welcome to Fixya
Err 99 could means several different things, such as... Memory Card, Lens or Lens contacts....

Here's what you can try:
Remove the memory card an enable "shooting with out memory card" and see if you still get the error. If it works your memory card is bad. Try another lens if you can. Clean the lens contacts with a pencil eraser (be careful not to get eraser dust in the camera body or in the lens). Worst case scenario is, Err 99 could be related to the shutter failing which would mean a trip to Canon.
Have a good one!

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